| 摘要 |
PURPOSE:To easily execute a high order interpolation processing by using a non-circulating type digital filter with the value of an hourly continuous (n) number of the sampling point of the value sampled by a period T as an input and giving respective coefficients as the variable of the necessary time. CONSTITUTION:The non-circulating type filter with the value of a certain continuous (n) point of the given sampling point as input data is constituted, and the coefficient is given as the variable to the necessary time. The interpolating processing can be given by the formula, and a necessary time (t) can be expressed by the function of an (m)-fold pitch width T' of a period T. Consequently, the value of a1(lT') is calculated in accordance with (l) and (i) based upon a certain interpolating formula and stored into a memory element such as a ROM beforehand. The contents of the memory element is retrieved as the function of times (t) and (l) and a0(lT')...a1(lT') can be obtained. By executing the calculating processing of the coefficient in accordance with the formula of the coefficient, an (n)th order interpolated g(t) can be obtained.
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